Concrete-mixer.



'I'. HBOLTE.

CONCRETE MIXER. APPLICATION FILED man?, 190s.

Patented sept. 15,1903. l

@SHEETS-SHEET 1.`

'1898,958. Y v ",TL'J.

Mz l l y fas fa iwf/s' i CONCRETE MIXER. APPLLGATION rmzn MAn.1.199s. f

Patented Sept. 15,- 19081 2 Yswims-SHEET 2.

, .Lx-p 24 ,e5 2k 'I l gezfm Q t .'ol/olalfl Y y fue To all Aiohomfit may concern'.l

' a'citi'zen of the United States,

an improved concrete mixer; and to t UMTED 'STATES Application filed March 7,

Beit known that I, TinioDoRE-H. B'OLTE, residing at Kearney, in the county of Builalo and State of Nebraska, have invented certain new an useful Improvements in Concrete-Mixers; and I do hereby declare the following to be a full, cleanand exact descri tion of the inven-A tion, such as will enable otiiiers skilled in the art to whichit appertains to make and use thesame. v

My invention hasfor its object to rovile is en 'the invention consists of the novel devicel and combinations of devices hereinafter described and defined inthe claims.

away. Fig. 2 is a plan view of thesame.

- is a cross section through ward incline from desired, on supporting truc -the axle of the rear truck The invention isillustrated in the accoman 'ng drawings wherein like 'characters indicate 'like parts throughout the several views. .y Y y 5"' 1 l In said drawings; Figure '1 ,is a 'side elevation of tlie'machine, with some parts broken Fig. 3 is a vertical longitudinal section through the machine,ivith some parts broken away and others shown in elevation, looking in the same direction as in Fig. 1 {Sand Fig. 4

chine, on the line az* :1;4 of Fig. 3.

The numeral 1 represents a skeleton frame' of suitable form to support the working parts of, the machine, and to be mounted,- when ks 2. As shown, is rigid with the frame, andthe axle oi'fthe vforward truck is pivoted thereto through agbolster 3 fixed to the frame and, ivotedto 'the truck axle. The numera s 4, 5 and. 6 represent, res ectively; the shaft, the spiders and the s ell of an open-ended mixing cylinder which is mounted -for rotary motion on -the main frame, with the cylinder and shaft extending lengthwise thereof and at an angle or downthe front toward the rear of the machine. The cylinder shaft 4 is mounted, at its rear end, in a bearing 7 suported byliaiiger 8 depending from the to ars of the main frame 1; andthe said sha t 4 is supported, at its upper or forward end, in a bearing 9 fixed to one of the cross bans of the said main frame 1.

` spe'ciscation metter raient.

A of themain'frame.

CONCRETE-irma, n

11 whiclijs engaged b .a bevel pinion 12 on driving shaft 13 whic is mounted in suitable b'earings fixed to the front standards of tlie main frame 1. The driving shaft 13 is equipped pull either by hand or'by belt.-

Aless feed belt shown as mounted on rollers 16 preperly disposed to cause the belt toextend. en travel in a general direction lengthwise `of the shaft ofthe mixingcylinderend di# rectl below the same. y Diagonal braces or brac 'ets 18 su port the lower end of the machine. The forward member of tlierolltends outward and is mounted iii suitable bearing boxes fixed tothe-forward standards n One end of tlieshaft 19 extends outward beyond the main frame and is provided witha sprocket wheel is connected by cha-iii 21with a relativel end, on theshaft 19, as shown, but might, of course, be su ported directly from the main framel. Wit said sprocket andchain connections 20, 21 forward member of the rollers 16 supporting the feed belt 15 will receive rotary motion from the driving shaft 13, and that, thereby,

tiniious motion with its upper ruiming fo d eylin er.

- Directly above the feed belt 15, and in tandem arrangement in respect to eacli other and in respect to the mixing cylinder, are

located a res ective y, the hopper 23 eing forcement an( the hopper 24 for the sand or mixture of sand and gravel or fine broken ston The 4am 24 extend entirely across the mainframe, thereby enabling the sand or the cement to g the shell 6 of the mixing cylinder are preferl machine.

` ably located spiral or conveyingiig its 10 extending lengthwise of the cylinder, .and throughout the central zone of the same,

and 24 are closed only by the directly underlying feed bolt 15, the belt being so mounted roller`frame'17 rom the main frame '1 of the.

ers 16' is 'provided with a shaft 19 which exat its forward' or to surface moving toward the mixing y l air Ofsupplylioppers 23 and 24,

v 'rnsonons H. Boeri-Lor KEARNEY, NEBRASKX, Assieme or ONE-Hrm fro EDWARD r. v v

f. BoLrnor EAU onimniviscoiism.

atentediSept. 15, I' ieoa. sea in.reitera;A 'thus leaving the cylinder free from flights at 'A i its receivingand delivery-ends., At its upper end, the shaft 4 is provided with abevel gear provided, 'at4 one end, with. ag' driving crank-V ey 14 for imparting power 1 i e5 The numeral lrepresents a suitable endsupported by a frame 17, with the said parts 20 which small sorocket wheel 22 on the driving sha t 13. T e roller fra-me 17 rests,

and 22, it is obvious that thev A the endless feed belt 15 will be kept'in'conup er or receiving ends of the hoppers 23 On the interior of be supplied thereto from-either side of the The lower or small ends of both hbppers iit- that. it runs" close to the lower edges ofthewalls of the said hoppers. The rearnf'all of the sand 'hwppcrfl is 'provided withv` a; discharge opening or slot controlled by 'sliding f gatefl mounted in the said wall under sutiifcient friction to remain in any position where set. l The cement hopper 23 is providedwith a similar slot 'in its rear' wall controlled `b V1o` stay in whatever position it may be set. As shown, the discharge outlets of the. two hoppers are staggered in respect to each other crosswise of tie belt, so Athat the sand will be deliveredto one longitudinal zone of the A :l5 belt and the cement to another longitudinal zone of the belt. thereby insuring a frec'fecd 1 o f the sand and cement from the res ective hop eis. An apron or guard boar 2'. is

' fixed' to the-mam frame directly in front of 2o the cement hop er 23, 'thereby affording a convenientrest or the bags of cement when emptying' the same into the hopper from the` front of them chine.

The. cementi fine and heavy-and does not 'z'rcquire any forced feed to-get itout of the hop er 2S vvheninits dry or 1n proper mixing con ition. 1t isdsirablc, however, to have some feeding dev-ice\\for the sand which will prevent the same front clogging at the lower end or discharge odtletfrom the hopper 24'. For this purpose, an( forthe further purpose of lowering this hopperivery materially, I .extend the shaft 4 -of \th`e\` mixing cylinder through the lower end of thsand hopper 24, and provide the same u'itlra series of radial feeding pins or spikes 28, asbstshown'in Fig. 3. These pins will keepthe sand loosened u p and insure its free discharge through theoutlet controlled by thegate 25.

40 The numeral 29 represents a water tank supported from the top side bars of the main frame, and provided with a delivery pi e 30 bent upon itself and extending into the ower or delivery end of the mixing cylinder. Said pipe 30 is provided with a hand valve 31 and the delivery end of the pi e is perforated .to secure sier or shower disc arge of the water onto the commingled sand and cement.

The operation of the machine is probably obvious from the abovegiven speciiication of .the psrts.- The hoppers 23 and 24 'and their discharge outlets are so proportioned' that when the respective gates 25 and 26 controlling said outlets have been properly set,

i 515- the cement and the sand will bc. `fed therevfrom in proper proportionsonto the endless feed belt, when the machine is in mot-lon, and

be delivered thereby into the upper or reee1v ing end of the mixing cylinder. Hence, if it V .be assumed that the machine is nr motion and that the hopers 23 and 24 are kept supplied 1with san and cement, respectively, and that. the shower of Watervis available from the `@rater tank, then the action is as follows: The sand and the cement are delivvided with gate controlled discharge outlets ered from the hoppers to the feed belt, and by said feed belt Ato thel receiving end of the' I mixing cylinder in prcper'proportion tov eacnrv other andin a dry condition.V Then, under the rotationof the cylinder, the sand and the "16' comentynll lbe thoroughly -commingled .tof gether before reaching the zone of the cylin`A .g der which is'snpplied \vith' a sjho\ver of water. sliding gate 26, also so supported that it wi lA ln this mixing action-g. the spiral flight-s lift up the'4 material until it `drops therefrom by 75*v y gravity to the bottom Aof the-cylinder, and c under the conveying action of the flightsand thc coperative action of gravity; the material -will be forced toward the delivery end of i the cylinder and out therefrom. kling z'onfe Ais of sufficient length to continue the mixing action after-the water begins to fall on the material for along enough time to thoroughly incor orate 'the water. Hence, the concrete as de ivered from the machine is j ready' for use. l It must be obvious that this'is an efficient and convenient machine which is simple-and cheap to make, andWhich ean'beutilized with a minimum of labor. The truck Wheels 2 are 90 of' small diameter, and in virtue of the factV that the mixing cylinder is setlowv on the main frame, and that the hoppers extend below the. shaft 'of said -cylirider iviththefeed' belt directly underlying the same, the upper ends .or receiving mouths ofthe hoppers are brought to a low, evel inrespect lto the ground.

It, of course, follows that the sand and ce ment do not have tobe lifted so high to be put into the hoppers.

rial, especially in respect to the sand, large uantities of which areused, and whichvis;

s oveled from the ground into the sand hop- -per.

From the fact that the hoppers 23 and'. o 24 extend entirely across the machine, the 105 sand and cement can be supplied from either` side of the machine, and the cement hop er 23 is so located that it may be supplied ilse y from the front of the machine.

will be understood, of course, that the all) 'various .working parts may be made o anygf. i

suitable material, asvlong as the saine 1s` adapted for the purposes had inwiew. For example, the feed belt may be of rubber,

leather, canvas or`flexible sheet steel or other 1'1`5 metal. l

1. In a concrete mixer, the combinationfl with a' rotary mixing cylinder and a pair of supply hoppers, other for the cement, set tandem with ren spect to each other and the cvlinder, and prostaggered with respect to each otherfcross-- wise of the underlying feed belt, and ariendless feed belt extending in the general dire 4tion of the axis of said cylinder With its upper running fold forming the bottom Walls of p said hoppexs and operative to receiveA the 1 sand and cement onfdiferent zones thereof 130 The sprin- 30 f one for the sand andthe 120,.'-

This is highly mate- 1'0 Y and-to deliver the same directly into the receiving end of said cylinder, substentiay as described.

2. The combination with the rotary mixing cylinder and means for supplying water to l.the interior of the lower or delivery end portion of said cylinder, of the pair of supply hoppers, one for sand and the other for ce- I nient, set tandem with respect to each other and the cylinder and having the staggered gate controlled .discharge outlets, the endless Y feed belt extending in the general'direction of the axis of said cylinder and 'operative to receive the sand and cement on different zones thereofand to deliver the. same te the receiving end of seid cylinder, and a drive for imiparting, motion to said cylinder and feed. be t, all for cooperation, substantially as described. y 3. In a concrete mixer, the combination with a Yrotary mixing cylinder set low on the Amain frame and at an incline lengthwise thereof, with its, shaft extended upward beyond Vthe uppei'driieceiving end of said cylin' der,'of a pair ofsnpply hopper's, one for sand and the other forcement, .set tandem with re-V sect to each otlier and said cylinder, with t eil'4 lower ends eiitending below said shaft 'and said shaft passing\througl1 the hoppers' and having radlal feed` pins on that portion thereof located withimtlie sand liorliper, and an endless feed belt directly under ying the lower ends of seid hoppers -and extendin in THEODORE n'. isoLTE.

Witnesses: Y CLARA L. BENNETT, V R. M. BARNEY. 

